TUNDISH NOZZLE EXCHANGING DEVICE, AND TUNDISH NOZZLE FOR USE IN THE DEVICE

摘要

Provided are a tundish nozzle exchanging device, which can make the inter-hole distance of tundish nozzles arrayed in the bottom portion of a tundish, shorter than that of the prior art, and a tundish nozzle for use in the exchanging device. The tundish nozzle exchanging device (1) comprises a first arm (6) for pushing and supporting a first lower nozzle (2) arranged on the lower face of a first upper nozzle disposed in a tundish bottom portion, and a second arm (7) for pushing and supporting a second lower nozzle (3) arranged on the lower face of a second upper nozzle disposed in the tundish bottom portion and adjacent to the first upper nozzle. At the rear end portions of the first arm (6) formed into a rectangular top plan shape and the rear end portion of the second arm (7) formed into a rectangular top plan shape, respectively, protrusions (6a and 7a) are formed to protrude backward. The second arm (7) is made thicker than the first arm (6). In the rear end face of the second arm (7), there is formed a recess (7c), into which the protrusion (6a) of the adjoining first arm (6) is inserted.